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Replacing the Key Battery for the Mercedes A-Class - B-Class

Model: Mercedes Classe A W169 - Years: 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
Part: Key

See other generations:
Video tutorial

In this video, you will see how to disassemble and replace the battery in the remote key for the Mercedes A-Class, as well as the B-Class. First, take your remote in hand and start by removing the physical key from inside it. Next, insert the key into the slot to remove the rear plastic cover, accessing the battery compartment as shown in the video.

At this point, remove and replace the battery with a new one of the correct type (in this case, a CR 2025 3V); insert it in the correct orientation and reassemble the cover and the key!


Updated on 14 May 2026 by ScegliAuto


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How to Reset the Tire Pressure Light on a MG ZS?

On the instrument cluster of the MG ZS, the tire pressure light that appears can be reset by inflating the tires to the correct pressure: this value will be indicated on the sticker attached to the driver's door pillar. Once the tires have been properly inflated, you can turn on the instrument cluster and navigate through the menu until you find the option that indicates tire pressure: if this screen shows the new values, the light will turn off; otherwise, you will need to drive for a few miles so that the sensors can read the new values and turn off the light afterward.

Watch the video!


by ScegliAuto

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